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Description: Building-scale potable water reuse research in downtown San Francisco
Building-scale potable water reuse research in downtown San Francisco
The PureWaterSF demonstration potable water reuse project investigated the feasibility of treating wastewater from a single office building to drinking water standards at the San Francisco Public Utilities Commission (SFPUC) downtown headquarters in California, United States (US). The authors report on the project, exploring a variety of issues such as ease of operation, reliability of online monitoring systems, and pathogen loads in office building wastewater.
Author(s)
Brynne Weeks
SourceArticle from July/August 2020 World Water Magazine
Project IDWW94
SubjectJuly/August Issue
Document typeMagazine article
PublisherWater Environment Federation
Print publication date Jul 2020
Volume / Issue43 / 4
Content sourceWorld Water Magazine
First / last page(s)30 - 32
Copyright2020
Word count2,337
Subject keywordsDecentralized Potable Reuse
Associated keywords:PureWaterSFCarollo EngineersSFPUCDPR demonstration projectwater purificationonline monitoringadvanced analyticsPepper Mild Mottle VirusPMMoV

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Description: Building-scale potable water reuse research in downtown San Francisco
DPR demonstration project
Building-scale potable water reuse research in downtown San Francisco
PureWaterSF was a building-scale DPR research project that was carried out in an office building for 16 months from June 2018 to October 2019. It was aimed at better understanding these opportunities and challenges with the goal of collecting data to help inform the broader, global dialogue on potable water reuse on both small and large scales. In particular, the project team sought to gather data...
PublisherWater Environment Federation
Copyright2020
Word count363
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Description: Building-scale potable water reuse research in downtown San Francisco
Scope and scale of research
Building-scale potable water reuse research in downtown San Francisco
SFPUC is committed to the innovative and sustainable use of water in an urban setting. Currently, SFPUC treats the wastewater generated in its 14-story headquarters building for non-potable reuse in toilets and urinals onsite. The existing and permanent non-potable reuse treatment train consists of the Living MachineTM (LM), a proprietary constructed wetlands system, followed by...
PublisherWater Environment Federation
Copyright2020
Word count310
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Description: Building-scale potable water reuse research in downtown San Francisco
Wastewater strength and variability
Building-scale potable water reuse research in downtown San Francisco
The data collected through PureWaterSF suggest that smaller sewersheds do contribute differential pathogen and chemical loads as compared to their larger, centralized counterparts.
PublisherWater Environment Federation
Copyright2020
Word count347
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Description: Building-scale potable water reuse research in downtown San Francisco
Advanced analytics for monitoring efficacy
Building-scale potable water reuse research in downtown San Francisco
Despite the variable influent wastewater quality, the PureWaterSF treatment train reliably produced purified water that met drinking water standards, as observed using a number of standard and advanced analyses. The purified effluent met federal and state standards for conventional contaminants regulated in drinking water systems.
PublisherWater Environment Federation
Copyright2020
Word count460
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Description: Building-scale potable water reuse research in downtown San Francisco
Challenges and recommendations
Building-scale potable water reuse research in downtown San Francisco
The PureWaterSF project team encountered a number of operational challenges. The UV AOP chlorine solution that was batched and stored onsite degraded over time, forming chlorate. The air-compressor controlling the UF instrumentation and valves frequently broke down. And a seal within the RO pump blew out.
PublisherWater Environment Federation
Copyright2020
Word count350
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Description: Building-scale potable water reuse research in downtown San Francisco
Authors’ Note
Building-scale potable water reuse research in downtown San Francisco
Water Reuse Technologist Brynne Weeks and Water Reuse Practices Director Andrew Salveson work at Carollo Engineers, Inc. and are based in Walnut Creek, California. Acting Manager of Alternative Water Supply Planning Manisha Kothari and Water Reuse Specialist Sarah Triolo work at SFPUC. Additional PureWaterSF results and discussion will be documented in US Bureau of Reclamation Agreement No....
PublisherWater Environment Federation
Copyright2020
Word count73
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Building-scale potable water reuse research in downtown San Francisco